<template>
    <div class="login_container">
      <div class="login_box">
          <!--头像取域-->
        <div class="avatar_box">
            <img src="../assets/logo.png" alt="">
        </div>
         <!--登录表单取域-->
        <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
            <!--用户名-->
            <el-form-item prop="username">
            <el-input v-model="loginForm.username"  prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
            <!--密码-->
            <el-form-item prop="password">
            <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
            </el-form-item>
            <!--按钮区域-->
            <el-form-item class="btns">
            <el-button type="primary"@click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
         </el-form>
      </div>

    </div>
</template>
<script>
export default {
    data(){
   //这是登录表单的数据绑定对象
   return{
      loginForm:{
          username:'admin',
          password:'123456'
      },
      //这是表单的验证规则对象
      loginFormRules:{
           //验证用户名是否合法
          username:[
               { required: true, message: '请输入登录名称', trigger: 'blur' },
               { min: 3, max: 10, message: '长度在3到10个字符之间', trigger: 'blur' }
               
          ],
          //验证密码是否合法
          password:[
              { required: true, message: '请输入密码', trigger: 'blur' },
               { min: 6, max: 15, message: '长度在6到15个字符之间', trigger: 'blur' }
               
          ]
      }
   };
    },
     methods:{
         resetLoginForm(){
           this.$refs.loginFormRef.resetFields();
        },
         login(){
             this.$refs.loginFormRef.validate(async valid=>{
                // console.log(valid);
             if(!valid) return;
            const { data:res }=await this.$http.post("login",this.loginForm);
            if(res.meta.status!==200) return  this.$message.error('登陆失败');
             this.$message.success('登录成功');
             //1.将登录成功的token，保存到客户端sessionStrorage中
               //1.1项目中出现登录以外的其他api接口，必须在登录之后才能访问
               //1.2token只在当前网站打开期间生效，所以保存在客户端sessionStrorage中
              window.sessionStorage.setItem("token",res.data.token);
           //2.通过编程时导航跳转到后台主页，路由地址是/home
              this.$router.push("/home");
            });
         }
     }
};
</script>
<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100%;
    
}
.login_box{
    width:450px;
    height:300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left:50%;
    top:50%;
    transform: translate(-50%,-50%);
    
    .avatar_box{
        width:130px;
        height:130px;
        border:1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position:absolute;
        left:50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
        
        img{
            width:100%;
            height:100%;
            border-radius: 50%;
            background-color:#eee;
        }
    }
    .login_form{
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;

    }
  .btns{
      display: flex;
      justify-content: flex-end;

  }
}
</style>